package cn.yh.springsecurity.config;

import cn.yh.springsecurity.exception.AccessDeniedHandlerImpl;
import cn.yh.springsecurity.exception.AuthenticationEntryPointImpl;
import cn.yh.springsecurity.filter.JWTFilter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;


@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private JWTFilter jwtFilter;

    @Autowired
    private AuthenticationEntryPointImpl authenticationEntryPoint;
    @Autowired
    private AccessDeniedHandlerImpl accessDeniedHandler;
    //@PasswordEncoder交给IOC容器来管理 -> 密码编码器
    //BCryptPasswordEncoder是Spring Security提供的一种密码编码器
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Override
    @Bean
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    @Override
    public void configure(HttpSecurity  http) throws Exception {
        http
                //关闭csrf防护，跨站请求伪造
                .csrf().disable()
                //不通过Session获取SecurityContext
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .authorizeRequests()
                // 对于登录接口 允许匿名访问
                .antMatchers("/user/login").anonymous()
                // 除上面外的所有请求全部需要鉴权认证
                .anyRequest().authenticated();

        http
                .addFilterBefore(jwtFilter, UsernamePasswordAuthenticationFilter.class);

        http
                .cors();
        http
                .exceptionHandling()
                .authenticationEntryPoint(authenticationEntryPoint)
                .accessDeniedHandler(accessDeniedHandler);
    }

}
